Preparation and energy consumption evaluation of bifunctional energy-efficient glass with superior superhydrophobic and heat shielding properties

Abstract

In this work, a complete process for preparation of SiO2/Cs0.32WO3 composite coatings with superhydrophobic and NIR shielding properties has been proposed. Combined nano-porous SiO2 with the spectral selective Cs0.32WO3, the composite coating could not only show excellent heat blocking property but also possess self-cleaning performance. In the simulated contaminant experiment, almost all of dust particles on the surface of composite coating could be picked up by the rolling droplets, and the water contact angle of the coating was up to 160°. The thermal shielding experiment proved that the SiO2/Cs0.32WO3 composite coating could effectively reduce more than 20% room temperature in the same irradiation time. Furthermore, the energy consumption simulation shows that comparing with normal glass, the SiO2/Cs0.32WO3 coated glass could save about 15.9% total electrical consumption per year in Guangzhou, which is even superior with that of low-e glass.